Deploy DNAC in a real environment you hardly get many engineers, since its totally new to Industry, people like us have some experience since we have a kit to use it in the real world or in the ccloud to get head around with the concept.
the best place is Local Cisco Partner or SE or contacts Csico directly they will offer you professional services through their channel.
Hopefully, you have enough budget to deploy DNAC its cost very huge for you. especially if you looking Large sites you need mix SDWAN + SDA ACCESS to bring together.